1987 Ford Bronco, beefed up 351w, JBG HD rear springs, JBG 4” coil, 10.25 rear posi, Dana 44 posi
My belt squeaks on startup and when I rev it hard as well as a chirp that pretty much becomes constant when driving. I recently have done a Saginaw pump 3g alternator and switched the underdrive crank pulley to the factory one. And wow what a difference with that. I also switched back to the stock water pump pulley because it had an aluminum one on it. I would say it started after the 130 amp alternator but it already had the 95 amp 3g on it. I got the 130 off a 1996 van. Could it be the alternator not aligned properly. I haven’t checked today because it’s been 40 and raining. Also is there a way to check what pulley it’s slipping on.